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CVE-2026-64306crypto: drbg - Fix returning success on failure in CTR_DRBG
- 5.5MediumCVSS base score
- 0.16%Exploitation in 30 daysEPSS · top 95% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
In the Linux kernel, the following vulnerability has been resolved: crypto: drbg - Fix returning success on failure in CTR_DRBG drbg_ctr_generate() sometimes returns success when it fails, leaving the output buffer uninitialized. Fix it.
Timeline
ID reserved
By Linux
- 6 days later
· 6 days later
Published
- 3 months later
· 3 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Analyzed | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.16% · top 95% of all CVEs (13 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Affected products
- affected cde001e4c3c3625c60b68a83eb1f1c2572dee07a – < 074db6db03a0aaa78f05ca9d4838053713796665
- affected cde001e4c3c3625c60b68a83eb1f1c2572dee07a – < 7b03312491f9fe6ba4d60c4023e7e61d2d1fed96
- affected cde001e4c3c3625c60b68a83eb1f1c2572dee07a – < 75597e8774f319152744d24e0683d9393540a951
- affected cde001e4c3c3625c60b68a83eb1f1c2572dee07a – < cc42fb40171c249bb859071d81b4eb007398a0bc
- affected cde001e4c3c3625c60b68a83eb1f1c2572dee07a – < bbbac12083eff489b35d848332f0dff311131344
- affected cde001e4c3c3625c60b68a83eb1f1c2572dee07a – < 23b8b188cb32e5531d0f8d3af9506f8959cb369e
- affected cde001e4c3c3625c60b68a83eb1f1c2572dee07a – < a9e886f73dd717027028bb7e3bbca93601ecdfc7
- affected cde001e4c3c3625c60b68a83eb1f1c2572dee07a – < 39a31ad9e2a5ed7e9c9c6f711dca96c8c8f5f26b
- affected f60b0fa8bbddde66f1d197be07120264b555c84a
- affected 3.12.44 – < 3.13
- affected 4.1
- unaffected < 4.1
- unaffected 5.10.261 – ≤ 5.10.*
- unaffected 5.15.212 – ≤ 5.15.*
- unaffected 6.1.178 – ≤ 6.1.*
- unaffected 6.6.145 – ≤ 6.6.*
- unaffected 6.12.96 – ≤ 6.12.*
- unaffected 6.18.39 – ≤ 6.18.*
- unaffected 7.1.4 – ≤ 7.1.*
- unaffected 7.2 – ≤ *
References
References8
- https://git.kernel.org/stable/c/074db6db03a0aaa78f05ca9d4838053713796665 (opens in a new tab)
- https://git.kernel.org/stable/c/7b03312491f9fe6ba4d60c4023e7e61d2d1fed96 (opens in a new tab)
- https://git.kernel.org/stable/c/75597e8774f319152744d24e0683d9393540a951 (opens in a new tab)
- https://git.kernel.org/stable/c/cc42fb40171c249bb859071d81b4eb007398a0bc (opens in a new tab)
- https://git.kernel.org/stable/c/bbbac12083eff489b35d848332f0dff311131344 (opens in a new tab)
- https://git.kernel.org/stable/c/23b8b188cb32e5531d0f8d3af9506f8959cb369e (opens in a new tab)
- https://git.kernel.org/stable/c/a9e886f73dd717027028bb7e3bbca93601ecdfc7 (opens in a new tab)
- https://git.kernel.org/stable/c/39a31ad9e2a5ed7e9c9c6f711dca96c8c8f5f26b (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-49018 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-64306)Record last updated .